Abong Magnetic Wooden Cannon - Four-Stage Chain Reaction Magnetic Accelerator - Includes Rare-Earth Magnets and Ball Bearings

This four stage magnetic accelerator assembles in minutes without tools or glue. It is built in a series of stages, each containing a magnet, a spacer, and a projectile. In starting the chain reaction, a steel ball is released, which accelerates towards the first stage magnet. Like billiard balls, when it strikes the magnet, its energy is transferred through the magnet and spacer and into the projectile which speeds off toward the next stage. The process repeats until the last projectile leaves the end of the device. The more stages an accelerator has, and the more powerful the magnets are at each stage, the faster the ball bearing will leave the final stage. It includes powerful rare-earth magnets, steel ball bearings, and a 22 centimeter (8.5 inches) long firing trough plus all the hardware needed to build your magnetic accelerator. You can even join more than one kit to multiply the effect even further. The Magnetic Cannon is recommended for kids ages 10 and up.